Concerta (methylphenidate) is a central nervous system stimulant. It affects chemicals in the brain and nerves that contribute to hyperactivity and impulse control. Concerta extended-release tablets are used to treat attention deficit hyperactivity disorder (ADHD) in adults and children 6 years of age and older. Concerta may also be used for purposes not listed in this medication guide.

Ambien (zolpidem) is a sedative, also called a hypnotic. Zolpidem affects chemicals in the brain that may be unbalanced in people with sleep problems insomnia). Ambien is used to treat insomnia. The immediate-release tablet is used to help you fall asleep when you first go to bed. The extended-release form, Ambien CR, which has a first layer that dissolves quickly to help you fall asleep, and a second layer that dissolves slowly to help you stay asleep. Your doctor will determine which form of Ambien is best for you.

This medicine has a risk of abuse and misuse. Use Ritalin SR (methylphenidate controlled-release tablets) only as you were told by your doctor. Tell your doctor if you have ever abused or been addicted to any drugs or alcohol.